
package com.cdh.oa.util;

import lombok.extern.slf4j.Slf4j;

import java.security.MessageDigest;

/**
 * md5工具类
 *
 */
@Slf4j
public class MD5Util {

	private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5","6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };

	private static String byteArrayToHexString(byte b[]) {
		StringBuilder resultSb = new StringBuilder();
		for (byte aB : b) {
			resultSb.append(byteToHexString(aB));
		}
		return resultSb.toString();
	}

	private static String byteToHexString(byte b) {
		int n = b;
		if (n < 0)
			n += 256;
		int d1 = n / 16;
		int d2 = n % 16;
		return hexDigits[d1] + hexDigits[d2];
	}

	public static String getMD5(String origin) {
		String resultString = null;
		try {
			resultString = origin;
			MessageDigest md = MessageDigest.getInstance("MD5");
			resultString = byteArrayToHexString(md.digest(resultString.getBytes("UTF-8")));
		} catch (Exception ignored) {
			log.debug("MD5转换异常！！");
		}
		return resultString;
	}

	public static void main(String[] args) {
		String md5 = MD5Util.getMD5("admin");
		System.out.println(md5);
		System.out.println(MD5Util.getMD5("admin"));
	}

}